TW201545936A - Bicycle disc brake caliper - Google Patents

Abstract

A disc brake caliper is provided. The disc brake caliper may include a main body having a first portion, a second portion having no bleeding port, and a connecting portion connecting the first portion with the second portion such that a slot for arranging a disc rotor is defined between the first portion and the second portion. Arranged on the first portion are a first fluid port and a second fluid port fluidly connected to the first fluid port by a fluid flow path.

Description

Bicycle disc brake caliper

The invention relates to bicycle disc brake calipers.

In recent years, some high performance bicycles have included hydraulic disc brake systems. Hydraulic disc brake systems typically include disc brake calipers and brake lever members. When fluid pressure is applied to the first and second pistons of the disc brake caliper from the brake lever member, the brake pads of the disc brake come into contact with the rotor, thereby applying frictional resistance and slowing or stopping the bicycle.

The disc brake calipers and brake lever members are in fluid communication with each other via a fluid conduit. The fluid conduit is coupled to the disc brake caliper via a first fluid port on the disc brake caliper. A second fluid port is also provided on the disc brake caliper to allow the brake to be bleed.

Conventional disc brake calipers position the first fluid port and the second fluid port relative to the rotor on opposite sides of the caliper body. This allows the fluid flow path to be simply routed and has a short fluid flow path length within the disc brake caliper itself. Fluid flow path is from disc The first side of the brake caliper enters, communicates with the first piston on the first side, then travels to the other side and communicates with the second piston on the other side, and via the caliper in the disc brake during venting of the line The second fluid port outlet on the other side.

However, in the conventional disc brake caliper, it is difficult to reduce the volume of the disc brake caliper in the lateral direction of the bicycle due to the reverse arrangement of the first and second fluid ports.

In order to solve the above problems, a disc brake caliper is provided. According to a first aspect of the invention, a disc brake caliper can include a body having a first portion, a second portion having no vent opening, and a first portion coupled to the second portion such that A groove for arranging the disc rotor is defined as a joint portion between the first portion and the second portion. The first portion is configured with a first fluid port and a second fluid port fluidly coupled to the first fluid port by a fluid flow path. One potential advantage of this configuration is that both the first fluid port and the second fluid port are disposed on the first portion of the body, thereby allowing the body to reduce the bicycle when the body is coupled to the bicycle The volume of the lateral direction.

In the first aspect, the first fluid port is configured to face outward from the body in the first direction, and the second fluid port is configured to face outward from the second direction of the body opposite to the first direction. One potential advantage of this configuration is that it facilitates drainage, bleed, and injection of hydraulic fluid through the two fluid ports.

In the first aspect, in a state in which the main body is coupled to the bicycle, the first direction is a forward direction, and the second direction is a rearward direction. One potential advantage of this configuration is also to facilitate drainage, bleed, and injection of hydraulic fluid through the two fluid ports.

In a first aspect, the fluid flow path extends from the first fluid port on the first portion through the first portion, the second portion, and the connecting portion, and to the second fluid port. One potential advantage of this configuration is that the fluid flow path allows fluid pressure to be applied to both pistons and brake pads without any branching of the fluid flow path.

In the first aspect, the disc brake caliper includes a first piston movable in a moving direction of the piston, and a second piston movable in a moving direction of the opposite piston. The first portion includes a first hole, the first hole is included in the fluid flow path, and the first piston is movably disposed in the first hole, and the second portion includes the second hole, the second hole is Included in the fluid flow path, and the second piston is movably disposed within the second bore. One potential advantage of this configuration is that the holes forming the fluid flow path are coupled to the brake pads via the pistons, thus responding immediately to fluid pressure.

In the first aspect, the fluid flow path sequentially extends from the first fluid port to the connecting portion, to the second hole, to the connecting portion, to the first hole, and to the second fluid port, and this also has A potential advantage of shortening the fluid flow path in certain configurations in the case of maintaining a fluid flow path without any branches as described above.

In a first aspect, the disc brake caliper includes a connecting bolt, and the main body has a receiving hole, the receiving hole being constructed to extend through the first a portion, a second portion, and a connecting portion to receive the connecting bolt, and the fluid flow path includes a first passage, the first passage being disposed between the receiving hole and the connecting bolt to connect the first fluid port with The second hole is connected. This has the potential advantage of allowing the connecting bolt to define a fluid flow path, while shortening the fluid flow path with the fluid flow path without any branches as described above.

In a first aspect, the fluid flow path includes a second passage formed in the connecting bolt to connect the second bore to the first bore, and this has the potential advantage that only one connecting bolt is required The fluid flow path can be defined at the connection portion, which reduces the number of components required for the assembly, as described above, to maintain a fluid flow path without any branches.

In the first aspect, the body is constructed such that the first portion, the second portion, and the connecting portion are formed as a single unit member, and this has a cost reduction by reducing the number of components required for the assembly. Potentially beneficial.

In the second and third aspects, the fluid flow path sequentially extends from the first fluid port to the first hole, to the connecting portion, to the second hole, to the connecting portion, and to the second fluid port, and This also has the potential advantage of shortening the fluid flow path in certain configurations with the fluid flow path without any branches as described above.

In the second aspect, the body is constructed such that the first portion, the second portion, and the connecting portion are formed on at least two separate members, and this has the potential advantage of reducing the complexity of each of the components.

In a second aspect, the body has a receiving aperture formed to extend through the first portion, the second portion, and the connecting portion to receive the connecting bolt, and the fluid flow path includes the first passage, the first A passage is disposed between the receiving hole and the connecting bolt to connect the first fluid port with the second hole. This has the potential advantage of allowing the connecting bolt to define a fluid flow path, while shortening the fluid flow path while maintaining a fluid flow path without any branches.

In a second aspect, in the case where the body has an additional receiving aperture and the additional receiving aperture is configured to extend through the first portion, the second portion, and the connecting portion to receive additional connecting bolts, the fluid flow path includes a second passage, the second passage being disposed between the additional receiving hole and the additional connecting bolt to connect the second hole with the second fluid port, and this has the potential advantage that only one connecting bolt can be used The connecting portion defines a fluid flow path that reduces the number of components required for the assembly in the case of maintaining a fluid flow path without any branches as described above.

In a second aspect, at least a portion of the receiving aperture and at least a portion of the additional receiving aperture extend in a direction parallel to the direction of movement of the piston, and this has the ability to allow the hydraulic fluid to pass the shortest fluid flow path through the two A potential advantage of the piston.

In the third aspect, the body is constructed such that the first portion, the second portion, and the connecting portion are formed as a single unit member, and this has a cost reduction by reducing the number of components required for the assembly. Potentially beneficial.

In a third aspect, the disc brake caliper includes a first dense a cover and a second sealing cover, and the fluid flow path has a first portion connecting the first hole and the second hole and having a first opening sealed by the first sealing cover, and a second hole communicating with the second fluid The port is connected and has a second portion of the second opening that is sealed by the second sealing cover. This also has the potential advantage of avoiding having to define a fluid flow path within the connecting bolt, thus making it possible to reduce the number of components required for the assembly.

In the third aspect, the first opening and the second opening are disposed on the first portion, and this allows the body to reduce its volume in the lateral direction of the bicycle.

In a third aspect, at least a portion of the first portion and at least a portion of the second portion extend in a direction parallel to the direction of movement of the piston, and this has the shortest fluid flow path for allowing hydraulic fluid to be used. A potential advantage through the two pistons.

In the first aspect, in a state in which the main body is coupled to the bicycle, the hydraulic disc brake caliper has a first portion that is disposed closer to the wheel than the second portion. A potential advantage of this configuration also allows the hydraulic lines to be visually hidden for this purpose.

This Summary is provided to introduce some concepts selected in a simplified form, and these concepts are further described in the "embodiments" below. This Summary is not intended to identify key features or essential features of the claimed subject matter, and is not intended to limit the scope of the claimed subject matter. In addition, the claimed subject matter is not limited to implementations that solve any or all disadvantages noted in any part of the disclosure.

The present invention is illustrated by way of example, and not by way of limitation

1‧‧‧Bicycle

1A‧‧‧ frame

2‧‧‧ disc rotor

2A‧‧‧ disc rotor

2B‧‧‧ disc rotor

4A‧‧‧ front wheel

4B‧‧‧ rear wheel

6‧‧‧Brake operating device

8‧‧‧ handlebars

9‧‧‧Hydraulic pipeline

10‧‧‧Disk calipers

10A‧‧‧Front disc brake calipers

10B‧‧‧ rear disc brake calipers

12‧‧‧ Subject

14‧‧‧ first part

16‧‧‧Part II

18‧‧‧Connected parts

20‧‧‧ trench

22‧‧‧First fluid port

24‧‧‧Second fluid port

26‧‧‧ Fluid flow path

28‧‧‧班管管接头固定螺栓

30‧‧‧班管管接头

32‧‧‧Relief valve

34‧‧‧Connecting bolts

36‧‧‧ receiving hole

34A‧‧‧ recessed part

34B‧‧‧Internal hole

37A‧‧‧First Piston

37B‧‧‧Second Piston

38A‧‧‧First brake pad

38B‧‧‧Second brake pad

40‧‧‧ first hole

42‧‧‧ second hole

44‧‧‧First Passage

46‧‧‧second channel

48‧‧‧ third channel

50‧‧‧fourth channel

52‧‧‧ fluid flow path

110‧‧‧ disc brake calipers

112‧‧‧ Subject

114‧‧‧ first part

116‧‧‧ second part

118‧‧‧Connected parts

122‧‧‧First fluid port

124‧‧‧Second fluid port

126‧‧‧ fluid flow path

134‧‧‧Connecting bolts

134A‧‧‧ recessed part

136‧‧‧ receiving hole

136A‧‧‧first opening

137A‧‧‧First Piston

137B‧‧‧second piston

138A‧‧‧First brake pad

138B‧‧‧Second brake pad

140‧‧‧ first hole

142‧‧‧second hole

144‧‧‧First Passage

146‧‧‧second channel

152‧‧‧Adding access hole

152A‧‧‧ second opening

154‧‧‧Additional connection bolts

154A‧‧‧ recessed part

210‧‧‧ disc brake calipers

212‧‧‧ Subject

214‧‧‧ first part

216‧‧‧ second part

218‧‧‧Connected parts

224‧‧‧Second fluid port

226‧‧‧ fluid flow path

236A‧‧‧first opening

236B‧‧‧ second opening

237A‧‧‧First Piston

237B‧‧‧second piston

238A‧‧‧First brake pad

238B‧‧‧Second brake pad

240‧‧‧ first hole

242‧‧‧ second hole

256A‧‧‧first sealing cover

256B‧‧‧Second sealing cover

A‧‧‧ points

B‧‧‧ points

C‧‧‧ points

D‧‧‧ points

D1‧‧‧ first direction

D2‧‧‧ second direction

DM‧‧‧Piston moving direction

1 shows a side view of an illustrative bicycle having a hydraulic disc brake caliper in accordance with a first embodiment of the present invention.

2 is a top plan view of the disc brake caliper of FIG. 1.

Figure 3 is a cross-sectional view of the disc brake caliper.

4 is a perspective view of a wheel side of the disc brake caliper of FIG. 2.

Figure 5 is a schematic illustration of a fluid flow path of a disc brake caliper in accordance with a second embodiment of the present invention.

Figure 6 is a schematic illustration of a fluid flow path of a disc brake caliper in accordance with a third embodiment of the present invention.

Figures 1 through 6 are drawn to scale, unless otherwise indicated, but other relative dimensions may be used if desired.

Selected embodiments of the invention are described below with reference to the accompanying drawings. It is apparent to those skilled in the art that the following description of the embodiments of the present invention is provided by way of illustration and not limitation This hair Bright.

Referring first to Figure 1, a bicycle 1 includes a frame 1A, and a pair of disc brake calipers 10 according to an exemplary embodiment for grasping the corresponding disc rotor 2. The front disc brake caliper 10A is attached to the front fork of the frame 1A to grasp the disc rotor 2A of the front wheel 4A to apply a stopping force to the front wheel 4A. The rear disc brake caliper 10B is attached to a chain stay or a seat stay of the frame 1A to grasp the disc rotor 2B of the rear wheel 4B and apply a stopping force to the rear wheel 4B. A pair of brake operating devices 6 each including a respective finger actuated lever assembly are preferably coupled to the handlebar 8 of the bicycle 1. The pair of brake operating devices 6 are respectively coupled to the disc brake caliper 10 by hydraulic lines 9. Actuating the brake operating device 6 by grasping the lever assembly causes fluid, such as mineral oil, to be expelled from the associated master cylinder, traveling through the hydraulic line 9 to each of the disc brake calipers 10. As the fluid travels into the disc brake caliper 10, the fluid forces the pistons contained within the disc brake caliper 10 to clamp the front and rear disc rotors 2A and 2B, thereby applying a detent to the front and rear wheels 4A and 4B, respectively. . Since the pair of disc brake calipers 10 have substantially the same configuration, only one of the disc brake calipers 10 is exemplified in detail for the sake of brevity.

As shown in Figures 2 and 3, the disc brake caliper 10 includes a body 12 that is preferably formed of a rigid metallic material such as an aluminum alloy. As shown in FIG. 3, the main body 12 includes a first portion 14, a second portion 16 having no vent opening, and a first portion 14 and a second portion 16 for arranging the disc. The groove 20 of the rotor 2 is defined at the first The connecting portion 18 between the portion 14 and the second portion 16. In this embodiment, the body 12 is constructed such that the first portion 14, the second portion 16, and the connecting portion 18 are formed as a single unit member.

The body 12 also includes a first fluid port 22 and a second fluid port 24 (Fig. 2). The second fluid port 24 is fluidly coupled to the first fluid port 22 by a fluid flow path 26 (Fig. 3). The first fluid port 22 is disposed on the first portion 14. The second fluid port 24 is disposed on the first portion 14. In the illustrated embodiment, the first fluid port 22 acts as an inflow port and the second fluid port 24 acts as an outflow port. A banjo fixing bolt 28 (Fig. 4) is mounted to the first fluid port 22 to attach the splicing pipe joint 30 to the body 12. The splicing pipe joint 30 is coupled to the brake operating device 6 via a hydraulic line 9 . The bleed valve 32 is mounted to the second fluid port 24, which allows the operator to perform maintenance by opening the bleed valve 32 and venting fluid to the exterior of the hydraulic brake system.

Referring now to FIG. 3, in a state where the main body 12 is coupled to the frame 1A of the bicycle 1 having the frame 1A, the first portion 14 is disposed closer to the corresponding front wheel of the bicycle 1 than the second portion 16. 4A or rear wheel 4B. The disc brake caliper 10 also includes a connecting bolt 34. The body 12 has a receiving aperture 36 that is configured to extend through the first portion 14, the second portion 16, and the connecting portion 18 to receive the attachment bolts 34. The connecting bolt 34 is positioned within the slot 20. The connecting bolt 34 has a concave portion 34A along the outer periphery of the connecting bolt 34, and an inner hole 34B extending through the center of the connecting bolt 34. As detailed below The recessed portion 34A and the inner bore 34B define a channel that forms a portion of the fluid flow path 26 through which the fluid can flow.

The disc brake caliper 10 further includes a first piston 37A movable in the piston moving direction DM and a second piston 37B movable in the opposite piston moving direction DM. When the brake operating device 6 is actuated, fluid flows into the disc brake caliper 10, which moves the first and second brake pads 38A and 38B from the release position that allows the disc rotor 2 to freely rotate to the first and The second brake pads 38A and 38B contact the braking position of the disk rotor 2. In the braking position, the first and second brake pads 38A and 38B apply a braking force to the disk rotor 2. On the first portion 14, the first brake pad 38A is coupled to the first piston 37A. On the second portion 16, the second brake pad 38B is coupled to the second piston 37B.

In this embodiment, the fluid flow path 26 extends from the first fluid port 22 on the first portion 14 through the first portion 14, the second portion 16, and the connecting portion 18, and to the first The second fluid port 24 on the portion 14. The first portion 14 includes a first aperture 40 that is included in the fluid flow path 26 and the first piston 37A is movably disposed within the first aperture 40. The first piston 37A is coupled to the first brake pad 38A on the first portion 14. The second portion 16 includes a second bore 42 that is included in the fluid flow path 26 and the second piston 37B is movably disposed within the second bore 42. The second piston 37B is coupled to the second brake pad 38B on the second portion 16. In this embodiment, the fluid flow path 26 sequentially extends from the first fluid port 22 to the connecting portion 18, to the second hole 42, to the connecting portion 18, to the first hole 40, and To the second fluid port 24. This allows the fluid flow path 26 to begin and end on the same side of the body 12 that faces the frame 1A.

In this embodiment, the fluid flow path 26 includes a first passage 44 that is disposed between the receiving bore 36 and the attachment bolt 34 to connect the first fluid port 22 with the second bore 42. In more detail, the first passage 44 is disposed between the inner peripheral surface of the receiving hole 36 and the recessed portion 34A of the connecting bolt 34. Additionally, the fluid flow path 26 includes a second passage 46 formed in the attachment bolt 34 to connect the second bore 42 with the first bore 40. In more detail, the second passage 46 is formed in the internal bore 34B of the connecting bolt 34. As such, it should be understood that the first passage 44 and the second passage 46 are formed by the channels of the connecting bolts 34. In particular, the outer channel on the attachment bolt 34 defines a first passage 44 and the inner channel in the attachment bolt 34 defines a second passage 46. The first passage 44 is in communication with the first fluid port 22 and the third passage 48 leading to the second bore 42. The fourth passage 50 leads from the second bore 42 to the second passage 46 of the connecting bolt 34, which in turn is in fluid connection with the first bore 40. Fluid flow path 26 leads from first bore 40 to second fluid passage 24. It should be noted that in an alternative embodiment, the fluid flow path from the first bore 40 to the second fluid port 24 may extend in the other direction, as shown by the fluid flow path 52, and in this case the second The fluid port is adjacent to the first fluid port.

As shown in FIG. 4, the first fluid port 22 faces the outside of the body 12 in the first direction D1, and the second fluid port 24 faces the outside in a second direction opposite to the first direction D1. Specifically, in the example In the embodiment, in a state where the main body 12 is coupled to the frame 1A of the bicycle 1, the first direction D1 is the forward direction, and the second direction D2 is the rearward direction. More specifically, the first direction D1 in which the first fluid port 22 faces is forward, and the second direction D2 in which the second fluid port 24 faces is backward and downward. It should be noted that in an alternative embodiment, the second fluid port may be adjacent to the first fluid port and face the same direction as the first fluid port, as illustrated by fluid flow path 52 in FIG.

As discussed above, the first fluid port 22 and the second fluid port 24 are both intentionally disposed on the first portion 14 such that the second portion 16 does not have any fluid inlets or outlets, including venting mouth.

Figure 5 shows schematically a disc brake caliper 110 in accordance with a second embodiment of the present invention. The disc brake caliper 110 is similar to the disc brake caliper 10 described above, and thus will not be repeatedly described except for the difference in the sake of brevity.

In the disc brake caliper 110, the main body 112 is constructed such that the first portion 114, the second portion 116, and the connecting portion 118 are formed in at least two separate members. More specifically, the main body 112 is constructed by the first member and the second member such that a portion of the first portion 114 and the connecting portion 118 is disposed on the first member, and the second portion 116 and the connecting portion Another portion of the portion 118 is disposed on the second member. In the main body 112, the fluid flow path 126 sequentially extends from the first fluid port 122 to the first hole 140 of the first portion 114, to the connecting portion 118, to the second hole 142 of the second portion 116, to The portion 118 is connected to the second fluid port 124.

More specifically, the fluid flow path 126 has a first portion (extending from point A to point B) that connects the first aperture 140 to the second aperture 142 via the connection portion 118. The first portion provides a receiving aperture 136 that is configured to extend through the first portion 114, the second portion 116, and the connecting portion 118 to receive the attachment bolt 134. The receiving aperture 136 has a first opening 136A, and a connecting bolt 134 is inserted through the first opening 136A to couple the first and second members of the body 112. The connecting bolt 134 has a recessed portion 134A. The first passage 144 is disposed between the receiving hole 136 and the connecting bolt 134 by the recessed portion 134A to connect the first hole 140 with the second hole 142.

Additionally, the fluid flow path 126 has a second portion (extending from point C to point D) that connects the second bore 142 with the second fluid port 124 via the connecting portion 118. The second portion provides an additional receiving aperture 152 that is configured to extend through the first portion 114, the second portion 116, and the connecting portion 118 to receive additional connecting bolts 154. The additional receiving aperture 152 has a second opening 152A with an additional attachment bolt 154 inserted through the second opening 152A to couple the first and second members of the body 112. The additional attachment bolt 154 has a recessed portion 154A. The second passage 146 is disposed between the additional receiving aperture 152 and the additional attachment bolt 154 by the recessed portion 154A to connect the second aperture 142 with the second fluid port 124.

In this embodiment, the receiving hole 136 and the additional receiving hole 152 extend in a direction parallel to the piston moving direction DM of the first and second pistons 137A and 137B, wherein the first and second pistons 137A and 137B They are coupled to the first and second brake pads 138A and 138B, respectively. In other words, at least a portion of the first portion and at least a portion of the second portion extend in a direction parallel to the direction of movement DM of the piston. This configuration allows the fluid flow path 126 to begin and end on the same side of the body 112 facing the frame 1A.

Figure 6 shows schematically a disc brake caliper 210 in accordance with a third embodiment of the present invention. The disc brake caliper 210 is similar to the disc brake caliper 110 described above, and thus will not be repeatedly described except for the difference in the sake of brevity.

In the disc brake caliper 210, the main body 212 is constructed such that the first portion 214, the second portion 216, and the connecting portion 218 are formed as a single unit member. The disc brake caliper 210 includes a first seal cover 256A and a second seal cover 256B.

The fluid flow path 226 has a first portion (extending from point A to point B) that connects the first aperture 240 to the second aperture 242 via the connection portion 218. The first portion has a first opening 236A that is sealed by the first sealing cover 256A. The fluid flow path 226 has a second portion (extending from point C to point D) that connects the second bore 242 with the second fluid port 224 via the connecting portion 218. The second portion has a second opening 236B that is sealed by the second sealing cover 256B. At least a portion of the first portion and at least a portion of the second portion extend in a direction parallel to the piston moving direction DM of the first and second pistons 237A and 237B, wherein the first and second pistons 237A and 237B is coupled to the first and second brake pads 238A and 238B, respectively. This configuration allows the fluid flow path 226 to begin And ending on the same side of the body 212 facing the frame 1A.

The term "comprising" and its derivatives, as used herein, are intended to be an open-ended term that is used to clearly define the existence of the described features, elements, components, groups, integers, and/or steps. This concept also applies to words with similar meanings, such as the terms "having", "including", and their derivatives.

As used herein, terms of degree such as "near or approximation" mean that the terms that are modified have a reasonable amount of deviation (eg, manufacturing tolerance) that does not result in a substantial change in the final result.

Although the specific embodiments of bicycle and hydraulic disc brake calipers have been described in detail, the particular configurations disclosed are intended to be illustrative of nature and not limiting. The features of the various embodiments described above, as well as the modifications thereof, may be combined in various different ways without departing from the scope disclosed herein.

10‧‧‧ disc brake calipers

12‧‧‧ Subject

22‧‧‧First fluid port

24‧‧‧Second fluid port

32‧‧‧Relief valve

Claims (19)

A disc brake caliper comprising: a main body including: a first portion; a second portion having no vent opening; and a connecting portion for the first portion and the second portion Connecting, such that a groove for arranging the disc rotor is defined between the first portion and the second portion; a first fluid port disposed on the first portion; and a second fluid The port is fluidly connected to the first fluid port by a fluid flow path, and the second fluid port is disposed on the first portion. The disc brake caliper of claim 1, wherein the first fluid port faces the outer side of the body in a first direction, and the second fluid port is in a second direction opposite the first direction Facing the outer side of the body. The disc brake caliper according to claim 2, wherein in the state in which the main body is coupled to the bicycle, the first direction is a forward direction, and the second direction is a rearward direction. The disc brake caliper of claim 1, wherein the fluid flow path extends from the first fluid port on the first portion through the first portion, the second portion, and The connecting portion is to the second fluid port. The disc brake caliper according to claim 4 of the patent application, a first piston movable in a moving direction of the piston and a second piston movable in a moving direction of the piston, wherein the first portion includes a first hole, the first hole is included in the fluid flow path, and the a first piston is movably disposed in the first bore, and the second portion includes a second bore, the second bore is included in the fluid flow path, and the second piston is movably disposed on the Inside the second hole. The disc brake caliper according to claim 5, wherein the fluid flow path sequentially extends from the first fluid port to the connecting portion, to the second hole, to the connecting portion, to the a first hole and to the second fluid port. The disc brake caliper of claim 6, further comprising a connecting bolt, wherein the main body has a receiving hole, the receiving hole being configured to extend through the first portion, the second portion, and the connecting a portion for receiving the connecting bolt, and the fluid flow path includes a first passage, the first passage being disposed between the receiving hole and the connecting bolt to connect the first fluid port with the second hole . The disc brake caliper of claim 7, wherein the fluid flow path includes a second passage formed in the connecting bolt to connect the second bore to the first bore. The disc brake caliper of claim 8, wherein the body is constructed such that the first portion, the second portion, and the connecting portion are formed as a single unit member. The disc brake caliper according to claim 5, wherein the fluid flow path sequentially extends from the first fluid port to the first hole, to the connecting portion, to the second hole, to the Connecting the portion to the second fluid port. The disc brake caliper of claim 10, wherein the body is constructed such that the first portion, the second portion, and the connecting portion are formed on at least two separate members. The disc brake caliper of claim 11, further comprising a connecting bolt, wherein the main body has a receiving hole, the receiving hole being configured to extend through the first portion, the second portion, and the connecting Part to receive the connecting bolt, and the fluid flow path includes a first passage, the first passage being disposed between the receiving hole and the connecting bolt to connect the first hole with the second hole. The disc brake caliper of claim 12, further comprising an additional connecting bolt, wherein the main body has an additional receiving hole, the additional receiving hole being configured to extend through the first portion, the second portion, And the connecting portion to receive the additional connecting bolt, and the fluid flow path includes a second passage disposed between the additional receiving hole and the additional connecting bolt to The second fluid port is connected. The disc brake caliper according to claim 13, wherein at least a portion of the receiving hole and at least a portion of the additional receiving hole extend in a direction parallel to a moving direction of the piston. The disc brake caliper of claim 10, wherein the body is constructed such that the first portion, the second portion, and the connecting portion are formed as a single unit member. The disc brake caliper according to claim 15, further comprising a first sealing cover and a second sealing cover, wherein the fluid flow path comprises a first portion, the first portion and the first hole a second hole is connected and has a first opening sealed by the first sealing cover, and the fluid flow path has a second portion, the second portion connecting the second hole to the second fluid port and having The second sealing cover seals the second opening. The disc brake caliper of claim 16, wherein the first opening and the second opening are disposed on the first portion. The disc brake caliper of claim 16, wherein at least a portion of the first portion and at least a portion of the second portion extend in a direction parallel to a direction of movement of the piston. The disc brake caliper of claim 1, wherein the first portion is disposed closer to the wheel than the second portion in a state in which the main body is coupled to the bicycle.